This Saturday night, Horror Master Peter Cushing stars in “Island of Terror,” in which residents of a remote island are…terrorized, of course…by some kind of things with tentacles. Don’t let one of them catch you. They’ll practically swallow you whole…after they dissolve you. Yecch! Catch all the terrible goings-on with Svengoolie, Saturday night at 11 on WGAL 8.2, MeTV Susquehanna Valley.